JP2013243916A - Method for assembling generator of wind mill in vertical direction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved method for assembling a wind mill generator.SOLUTION: The method for assembling the generator of a wind mill in the vertical direction comprises: a step of providing horizontal assembly supports 10, 10' which support the components 2, 3, 4, 5 of the generator so that the rotation axis (R) of the components 2, 4, 5 becomes substantially vertical during assembly, the assembly supports being configured to enable access to the interior of the components 2, 3 of the generator during assembly procedure; a step of placing a stator member (3) on a rotor member (2); and a step of bonding the stator member (3) to the rotor member (2).

Description

  The present invention relates to a method of assembling a wind turbine generator and an assembly arrangement for use in the vertical assembly of a wind turbine generator.

  Wind turbine generators can be quite large and therefore very heavy. For example, a direct drive generator for a horizontal 3.0 megawatt rated wind turbine can weigh on the order of 50 to 80 tons or more. Assembling such a generator can include first assembling a rotor structure with magnets and assembling a stator structure with windings. These must then be combined or “coupled”, for example in the case of an outer rotor machine, bearings are mounted so that the rotor can move freely around the stator. Such a combination is usually performed by supporting the rotor housing so that the rotation axis of the rotor is horizontal, and then inserting a horizontally held stator into the rotor internal cavity. Since the axis of rotation is horizontal throughout the combination, this procedure is commonly referred to as “horizontal coupling”. Various critical steps must be taken during the coupling to ensure that the rotor, stator and bearing are all accurately positioned relative to each other and that the overall assembly is assured. For example, in order to mount a permanent magnet on the generator's magnetic field array, usually the rotor, a magnet mounting step must also be performed. When using permanent magnets, a strong magnetic field exerts a very large force on the various components of the generator and other already installed magnets. The magnetic force and the weight of the rotor housing can act to distort the rotor housing during the magnet installation procedure. However, it is most important that a clearance of typically only a few millimeters is maintained between the field winding and the magnet during assembly. Known assembly techniques include the use of spacers, hydraulic or other position and orientation actuators and sensors to avoid any deviation from a predetermined minimum / maximum distance between the rotor and stator during coupling. . Such techniques also include the use of mechanical guiding means such as rails to guide the passage of the rotor and / or stator.

  Another challenge associated with large structures such as cylindrical hollow rotors of several meters in diameter is the inherent lack of stiffness and the resulting deformation. The weight of the rotor itself can cause significant deformation. To avoid such deformation during the coupling procedure, a support structure, such as a support ring, is temporarily attached around the rotor structure to maintain the circular periphery of the rotor structure. Can do. Such a support ring requires maintenance, maintenance and storage, thus increasing the overall construction cost. Furthermore, such components can fail and cause accidental contact between the rotor and stator being joined. Rotor deformation can cause misalignment between coupling members such as the rotor, bearings and stator due to misalignment at the interface. Another problem resides in attaching bolts to mating holes in the stator, rotor and bearing to interconnect the stator, rotor and bearing. This is because, necessarily, matching holes with very small gaps must be aligned with very high precision in order to pass the bolts. Another problem with such vertical coupling is centering of such heavy components. Another challenge in vertical coupling is that large and extremely rigid handling and support structures are required for each of the rotor and stator when combining the stator and rotor. These support structures are large and heavy, but must be adjusted very precisely in the millimeter range, which provides an even greater cost factor. For these reasons, known methods for assembling large generators are extremely time consuming and costly.

  Accordingly, it is an object of the present invention to provide an improved method of assembling a wind turbine generator that avoids the above problems.

  The object is achieved by a method for assembling a wind turbine generator according to claim 1 and an assembly arrangement according to claim 8.

  In accordance with the present invention, a method of assembling a wind turbine generator provides a horizontal assembly support for supporting a generator component such that the axis of rotation of the component is substantially vertical during assembly. And placing the rotor member on the horizontal assembly support, placing the stator member on the rotor member, and joining the stator member to the rotor member.

  The advantage of the method according to the invention is that the assembly or joining of the rotor member to the stator member is greatly simplified. Since the dead weight of the vertically supported rotor housing is not a problem in the generator assembly process according to the present invention, a thinner rotor housing is manufactured so that the total weight of the rotor assembly can be suitably kept low. Can do. Furthermore, additional steps that had to be taken to stabilize the rotor housing in conventional horizontal coupling methods, such as the use of a support ring around the rotor, are no longer required during the rotor or stator combination or "coupling". Not needed. This can lead to significant savings in the overall configuration of wind turbines and wind parks including many such wind turbines. Another advantage is that, as mentioned above, the large lifting and steering devices required to combine the rotor and stator in the conventional "horizontal coupling" procedure conveys the generator components with their axis oriented vertically. Can be replaced with a relatively simple and economical crane to do. Such a crane offers a significantly cheaper option and can be at least reliable and accurate.

  In accordance with the present invention, an assembly arrangement for use in the assembly of a wind turbine generator provides a horizontal for supporting the generator components such that the axis of rotation of the components is substantially vertical during assembly. An assembly support is included, and the assembly support is configured to allow access to the interior of the generator component during the assembly procedure.

  An advantage of the assembly arrangement according to the invention is that a very accurate assembly process can be achieved at a relatively low cost. With the assembly arrangement according to the invention, gravity is no longer an unfavorable force that needs to be dealt with, but rather is now on the side. Heavy members such as the rotor housing are no longer distorted by their own weight. Instead, its weight is now an advantage. This is because the weight serves to hold the heavy member in place on the assembly support. Further, the assembly support allows access to the interior of the member during the assembly procedure, so that many assembly steps can be performed while the generator component is conveniently located on the assembly support. Another advantage of the assembly arrangement according to the present invention is that it requires less installation area than an equivalent horizontal assembly device that is necessarily large and bulky so that the rotor and stator members can be supported horizontally. . The importance of this aspect becomes more meaningful for the assembly of many generators. This is because a significantly smaller footprint is required for a plurality of assembly stations, each containing an assembly arrangement according to the invention, rather than a conventional "horizontal coupling" assembly station.

  The invention also relates to the use of the assembly arrangement according to the invention in the assembly of a wind turbine generator.

  As shown in the following description, particularly advantageous embodiments and features of the invention are provided by the dependent claims. Features of different claim categories may be combined as appropriate to provide alternative embodiments not described herein.

  In the following, it may be assumed that the generator is a direct drive generator with an outer rotor, i.e. a stator is arranged inside the rotor. In such a direct drive generator, the permanent magnet is generally disposed inside the rotor, and the rotor acts as a magnetic field of the generator. Similarly, the windings are typically placed around the outer surface of the stationary stator, which thus acts as the generator armature. In the following, without limiting the invention to any form, it is assumed that the generator is a direct drive generator with permanent magnets arranged inside the rotor. Furthermore, in the following, the terms “rotor member” and “stator member” should be understood to mean a partially or fully assembled rotor and stator, respectively. For example, the rotor member can include a rotor housing that is already attached to another component, such as a main bearing. The stator member may include a main shaft around which windings are already attached.

  In order to ensure that the rotor runs smoothly around the stator, in a preferred embodiment of the invention, the assembly of the generator includes the step of attaching the rotor member to a bearing. This step can be performed before the rotor member is lowered to the horizontal assembly support. The bearing can include any suitable bearing arrangement such as a roller bearing with a plurality of rollers disposed in a race; a sliding bearing.

  During operation of the wind turbine, i.e., when the generator axis of rotation is more or less horizontal, gravity acting on the circular generator components can distort these components. Accordingly, in another preferred embodiment of the invention, the assembly method also includes the step of attaching an anti-elliptical ring to the bearing and / or rotor member. Such an anti-elliptical ring acts to counteract the tendency of circular components such as bearings to be distorted by the vertical pull of gravity and prevent these components from deviating from the circular shape. That is, the anti-elliptical ring preferably reduces wear on the bearing and extends the life of the bearing.

  In contrast to other types of generators, direct drive generators generally do not use rectifying slip rings. As a result, shaft voltage can be accumulated and the current path is discharged to the ground through the bearing. This ultimately leads to bearing abrasion and costly repairs. Accordingly, in another preferred embodiment of the invention, the assembly method also includes the step of attaching a grounding arrangement to the rotor member. For example, in order to electrically insulate the bearing from the rotor and / or stator, an insulating ring formed from a suitable material such as a glass epoxy laminate is typically attached to the bearing and / or rotor housing.

  In order to combine the stator and the rotor, a stator member, which may already have a plurality of stator windings already attached, can simply be introduced into the waiting rotor member. In the case of a direct drive generator, the bearings are generally arranged towards the hub side of the rotor housing, while the brake discs are generally arranged on the opposite side of the rotor housing. Thus, in a preferred embodiment of the method according to the invention, the stator member is inserted in the “hub side” direction through the “brake side” opening of the rotor member. For example, if the rotor member is placed on the horizontal assembly support so that the bearing is mounted directly on the horizontal assembly support, the stator member is simply lowered through the opening on the "brake side" of the rotor member. Can be made. This can be done by suspending the stator member with a crane, manipulating the stator member over the opening, and lowering the stator member into the rotor member until the stator member is placed on the bearing. The stator can then be coupled to the bearing. Since the stator shaft is hollow (and later provides a passage from the nacelle through the generator into the hub) and the rotor member is located on the horizontal assembly support, the Any clamping means for coupling to the bearing can be conveniently accessed.

  While inserting the stator member into the rotor member, it is important to ensure that the windings are not damaged, and any inner surface of the rotor housing should not be damaged. Thus, in another preferred embodiment of the invention, the step of positioning the stator member on the rotor member provides a plurality of spacers to ensure maintenance of a desired distance between the rotor member and the stator member. including. Such spacers can include protective elements that are temporarily disposed in the rotor housing and are removed again when the stator member is properly positioned within the rotor member.

  As mentioned in the introduction, the process of mounting the magnets on the generator is usually associated with a large unbalanced force until all the magnets are mounted. When all magnets are installed, the forces are effectively balanced with each other. In order to prevent undesired distortion of the rotor housing during the mounting process, the assembly method according to the invention preferably also includes the step of attaching a stabilization ring to the rotor member before mounting the plurality of magnets to the rotor member. . This stabilizing ring can be temporarily mounted around the rotor member so that it is only used during the magnet mounting step. Thereafter, the stabilization ring may be removed again and used in the assembly of another generator.

  The magnet can be attached to the rotor member before the stator member is inserted. However, the magnetic force generated by the permanent magnet increases the risk of other assembly steps that need to be performed near or within the rotor member before the stator member is inserted. Furthermore, if the magnet is already mounted, the step of inserting the stator member may be more difficult. This is because the very narrow gap between the magnet and the winding makes it difficult to ensure that the winding is not damaged during the insertion step. Thus, in a particularly preferred embodiment of the method according to the invention, after the step of placing the stator member on the rotor member, the magnet is attached to the rotor member. The magnet mounting procedure can be performed by lowering the magnet vertically into the rotor member and fixing the magnet to the inner surface of the rotor housing. Preferably, the rotor housing has a retaining groove into which a magnet can be fitted and is manufactured to prevent any lateral movement in the direction of the stator winding. The magnet mounting procedure is preferably performed in a controlled sequence to ensure uniform or balanced mounting of different polarity magnets ("N" pole magnets and "S" pole magnets).

  The horizontal assembly support can be configured in any suitable form. In one configuration, the horizontal assembly support is a floor with openings or pits large enough to accommodate one or more workers configured to coincide with the openings in the rotor or stator members. With a horizontal region at the height of However, such a configuration requires a large construction effort and pits below the floor height can create safety problems. Thus, in a particularly preferred embodiment of the invention, the assembly arrangement has a raised horizontal assembly support. Here, the term “lifted” should be understood to mean being lifted to some suitable height above the floor height in the form of a table. For example, a horizontal assembly support can have a plurality of support sections, each with a horizontal support surface, such that the support sections can be arranged with a respective horizontal support surface below a portion of the rotor. Relative to each other. In one embodiment, three or four such support sections can be arranged at 120 ° or 90 ° relative to each other so that the weight of the rotor is evenly supported. The support section can be shaped such that when placed in such an arrangement, an operator can access the interior of the rotor or stator mounted on the assembly support. However, before placing the rotor on such a composite assembly support, the top surface must first be accurately aligned, and such an alignment process is time consuming and prone to inaccuracies. Thus, in a particularly preferred embodiment of the invention, the assembly support comprises an assembly table with a substantially horizontal upper surface. Therefore, the upper surface of the assembly table is a substantially integral surface. In another preferred embodiment of the invention, the assembly table has an access opening shaped according to the opening of the rotor member. For example, the assembly table can have a circular opening large enough to provide comfortable access to the relevant areas of the stator / rotor member.

  The assembly table can be configured in the form of a conventional table, i.e. with three, four or more support legs. The entire assembly table can be formed from a suitable load bearing material, such as steel. As mentioned above, the top surface of the assembly table is preferably horizontal. This is because the alignment between the rotor and the stator must be very accurate, and a horizontal reference plane is advantageous. Therefore, in a particularly preferred embodiment of the invention, the assembly table has height adjusting means for adjusting the height of the upper surface. For example, one or more of the table legs can have height adjustable sections. These height adjustable sections can be extended or contracted independently of each other until the desired horizontal top surface is obtained. The height adjustment can be performed before lowering the rotor member to the assembly table and / or after lowering the rotor member to the assembly table.

  During the assembly of the generator, it is necessary to access the area on the “bottom surface” of the rotor, ie the surface resting on the assembly table. Thus, in a preferred embodiment of the invention, to provide access to the underside of the rotor member, the assembly support comprises a plurality of spacer blocks, preferably at least three spacer blocks attached to the assembly support. Have The spacer block is preferably arranged fixed to the assembly table, and the rotor member itself can also be arranged fixed to the spacer block. Such spacer blocks can serve a number of other important purposes. For example, the lower set of spacer blocks can support the anti-elliptical ring while initially providing space between the anti-elliptical ring and the rotor housing. Accordingly, in a preferred embodiment of the invention, the plurality of spacer blocks comprises a set of main spacer blocks for supporting the rotor member and an auxiliary spacer block for supporting another member such as an anti-elliptical ring. And a set of In addition, the spacer block can be configured to allow rotation of the inner ring of the bearing relative to the rotor member so that the bearing can be “run-in”. Such a bearing inner ring is stationary during normal operation of the generator. In the first step of such a bearing “run-in” process, the stator member is loosely bolted to the bearing. The bearing and stator member are then rotated together multiple times relative to the rotor member. Any connecting bolt can then be tightened to half the torque. In the next step, the stator member and the bearing are again rotated together several times. Finally, the bolt is tightened to full torque. This bearing run-in process ensures that the bearing is not subject to uneven strain and stress, and preferably extends its life. Such a running-in process is difficult, if not impossible, to perform during a conventional horizontal combination procedure.

  The size of the access opening and / or the height of the spacer block is preferably chosen to match the dimensions of the generator being assembled. For example, a 3.0 megawatt wind turbine generator can have a diameter of about 2 m or more. Thus, the inner diameter of the rotor can be about 2 m while the inner diameter of the stator can be about 1.5 m. Therefore, in a particularly preferred embodiment of the invention, the diameter of the access opening in the assembly table is at least 0.5 m. The height of the spacer block may also be selected considering the type of tool used when working on the lower rotor surface. For example, the height of the spacer block may be at least 10 cm, more preferably at least 50 cm, and in all cases the height is preferably comfortable tool access without compromising the stability of the support structure. Selected to enable.

  In another preferred embodiment of the method according to the invention, the step of clamping the rotor member to the horizontal assembly support is performed before the step of placing the stator member on the rotor member. In this way, the rotor is already fixedly attached to the assembly support, and therefore the position of the rotor has already been determined. Accordingly, the position of the stator relative to the rotor can be accurately determined so that the stator can be lowered into the rotor in an accurate alignment. The rotor can be secured to the horizontal assembly support using any suitable fastening means, such as vertical bolts or threaded rods that extend through the assembly support into the corresponding threaded bushings of the rotor. Such threaded rods can pass through corresponding openings in the assembly table and into the bushings of the rotor. However, in a preferred embodiment of the invention, if a spacer block is used, the spacer block is preferably one for receiving such a threaded rod for securing the rotor member to the assembly table. It has the above through holes. In this way, additional stability can be obtained. Such threaded rods can also serve as visual and physical guides when lowering the rotor members and / or bearings to the assembly table and centering these components. In addition, the threaded rod ensures that the rotor member and / or bearing is in place or orientation, thereby facilitating subsequent attachment of the stator member to the bearing. Instead of threaded bolts, a simple upright pin that is also configured to fit into a hole in the bearing may serve to serve as a guiding means and / or to center the bearing and the rotor.

  Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. However, the drawings are designed for illustrative purposes only and are not designed to define the scope of the invention.

It is a figure which shows the structural member of the generator during the conventional horizontal assembly process. 1 is a side view of a first embodiment of an assembly arrangement according to the present invention. FIG. FIG. 3 is a plan view of the assembly arrangement of FIG. 2. FIG. 4 shows a rotor member supported by the assembly arrangement of FIGS. 2 and 3 in a first stage of the vertical assembly method according to the invention. It is a figure which shows another step in the vertical direction assembly method by this invention. It is a figure which shows another step in the vertical direction assembly method by this invention. It is a figure which shows 2nd Embodiment of the assembly arrangement | sequence by this invention. It is a figure which shows 3rd Embodiment of the assembly arrangement | sequence by this invention.

  In the drawings, like numerals refer to like objects throughout the drawings. Objects in the drawings are not necessarily shown to scale.

FIG. 1 shows the components of a direct drive permanent magnet generator 100 during a conventional horizontal assembly process. Here, the outer rotor 101 is supported by a plurality of holding means or support structures (not shown) such that the rotational axis R of the outer rotor is substantially horizontal, i.e. parallel to the ground. Has been. Usually, the rotor 101 and the main bearing are attached to the upright support so that the main body of the rotor 101 protrudes horizontally from the upright support. The rotor 101 is configured to hold a large number of permanent magnets 102 on the inner surface of the rotor. A stator 103 with a winding 104 attached to the main shaft 105 must be inserted into the rotor. During this “horizontal coupling”, it is particularly important that the windings do not contact the inner surface of the rotor, whether or not the rotor is pre-mounted with magnets. Damage to the inner surface of the winding (generally formed from a rigid steel bar housed in protective wrapping) or the rotor (generally having a precisely machined groove to hold the magnet) is extremely costly Much effort has been invested in creating repairs and thus avoiding such damage. For example, the support structure that holds the rotor must be precisely matched to the support structure that holds the stator when the stator is inserted into the rotor. In addition, sensors may be provided to detect any critical situation. The extremely narrow gap g _A makes horizontal coupling particularly dangerous. This process is further complicated by the weight of the rotor 101 because the gravity F _G acts to distort the otherwise circular shape of the rotor 101. This distortion D is illustrated in dotted lines in an exaggerated form. Such distortions cause cracks in the rotor or permanent deformations that can have adverse effects, especially when the rotor is rotating during generator operation. Since excessive care must be taken to avoid such damage, the known horizontal coupling technique is necessarily slow, labor intensive and therefore very expensive.

  FIG. 2 shows a side view of a first embodiment of an assembly arrangement 1 according to the invention. FIG. 3 shows a plan view of the same embodiment. Here, the assembly arrangement 1 has an assembly table 1 with a substantially horizontal flat top surface 10 and a plurality of support pillars 11 or columns 11. Here, a sufficiently large opening 12 is formed in the upper surface 10 so as to allow the worker access to the internal cavity of the rotor member 2 indicated by the one-dot chain line and the stator member (not shown). . Spacer blocks 13 and 13 ′ are arranged around the opening 12. The main spacer block 13 can support the weight of the rotor member and the stator member, whereby the weight of these generator components is evenly distributed. The one or more main spacer blocks 13 may have through holes 130 formed to receive fasteners for bolting the rotor member 2 to the assembly table 1. The main spacer block 13 serves to ensure that the bearing remains free and movable during the combination procedure. The auxiliary spacer block 13 'is used to initially accommodate the anti-elliptical ring without contacting the rotor or bearing. These auxiliary spacer blocks 13 ′ can extend into the space above the opening 12, for example if such an anti-elliptical ring has a smaller diameter than the diameter of the opening 12. For the sake of clarity, the legs 11 or columns 11 are shown in the corners of the “table”, but they can also be equally positioned below the spacer block 13 for a preferred load distribution.

  FIG. 4 shows the assembly table of FIGS. 2 and 3 being used to support the rotor member 2 in the first stage of the vertical coupling procedure. Here, the rotor member 2 is lowered onto the spacer block 13 of the assembly table 1. Prior to this step, the horizontal level of the top surface 10 is checked. The rotor member 2 has a rotor housing 20 attached to a conical front plate 5 and a main bearing 4 on the “lower” side. This “lower” side will later become the hub side of the rotor when it occupies a horizontal position during operation in the wind turbine. The components of the rotor member 2 are shown very simplified for clarity. The rotor housing 20 has already been machined to form a groove 21 for holding a permanent magnet. Only a few such grooves 21 are shown here for the sake of clarity. The entire rotor member assembly 2 is lowered onto the spacer 13 by a suitable lifting device such as a crane and chain 7 indicated here by dotted lines. When arranged on the assembly table 1, the rotor member 2 is positioned so that the rotation axis R of the rotor member is vertical. In this position, the rotor member 2 is effectively protected from any distortion due to its own weight. Prior to this step, an anti-elliptical ring (not shown) may be placed in place on the auxiliary spacer block in the assembly table 1 so that the rotor member is lowered directly onto the anti-elliptical ring. The anti-elliptical ring is attached to the bearing 4 later, for example after the stator is attached to the bearing and after the bearing run-in procedure is performed. Therefore, the anti-elliptical ring can be initially placed on the other auxiliary spacer block at a level lower than the main spacer block 13, so that the anti-elliptical ring is coupled to the bearing at a later stage. It can be arranged in the state where preparations have been made. The portion of the bearing 4 that is coupled to the anti-elliptical ring extends to a level lower than the upper surface of the main spacer block 13 so as to be mounted on the anti-elliptical ring, but this is for the sake of clarity. Not shown here. This is because the drawing is intentionally kept simple.

  The operator 8 passes through the openings 12 in the table and the corresponding openings 22 such as circular openings in the rotor member 2, the ovalization ring, the main bearing 4, the front plate 5, etc. Comfortable access. As an additional safety precaution, the rotor member 2 can be fixed to the assembly table 1 by a threaded rod 15 that is passed through the spacer block 13 and screwed into the bushing of the rotor member 2. As described above, the threaded rod 15 also serves as a visual and physical guide for lowering the rotor member 2 and / or bearing 4 onto the assembly table 1 and centering these components 2,4. . Furthermore, the threaded rod 15 ensures that the rotor member 2 and / or the bearing 4 is in a predetermined position or orientation, thereby facilitating the attachment of the stator member to the subsequent bearing. Instead of a threaded bolt, a simple pin that is also configured to fit into a hole in the bearing 4 may serve to act as a guide means.

FIG. 5 shows another step in the vertical coupling assembly. Here, the stator member 3 is lowered into the rotor member 2. A guide block 16 is fixed in advance at a specific position on the stator member 3, and this guide block 16 is used to guide the stator member 3 to an accurate position with respect to the rotor member 2. The guide block 16 can have marks to be aligned with corresponding marks on the rotor member 2. Further, the guide block 16 is machined to the correct size and extends a predetermined distance below the lower surface of the stator member 3 to indicate the particular gap to be maintained. The stator member 3 has a winding 32 attached to the main shaft 30 and an inner shaft 31 that later serves as a passage between the hub and the nacelle. The gap between the main shaft 30 and the inner shaft 31 can accommodate the cooling arrangement. Gravity cannot act to distort the circular shape of the rotor housing 20, and the stator member 2 is simply lowered to a predetermined position by the crane, so that when the stator member 3 is lowered to the predetermined position, the windings are also rotors. It is relatively easy to ensure that the inner surface of the housing 20 is not damaged. The predetermined minimum gap g _min can always be maintained during the “vertical coupling”. For example, by first ensuring that the relative positions of the rotor member 2 and the stator member 3 are correct by aligning certain marks in the guide blocks 16 of the rotor member 2 and the stator member 3, the stator member 3 is connected to the main bearing 4. The stator member 3 can then be fixed to the main bearing 4 by an operator standing in the openings 12, 22. When the stator member 3 is lowered to a predetermined position in the bearing 4, they can be temporarily coupled to each other, and the bearing running operation procedure can be performed. Thereafter, the coupling of the stator member 3 to the bearing 4 is completed.

FIG. 6 shows another step in the vertical coupling assembly. Here, the magnet is mounted in the groove 21 of the rotor housing 20. For stability during the mounting process, a stabilization ring 6 is mounted on the “up” side of the rotor housing 20, ie on the brake side. The magnet can be conveniently lowered from above to a predetermined position. For this purpose, a platform (not shown) can be installed around the generator during assembly so that the operator can conveniently stand at a higher level of the rotor member 2. Since gravity is not a problem, the magnet can be lowered into the groove 21 while maintaining the required gap g _A , which is usually on the order of only a few millimeters.

  After the magnet mounting step, another assembly step can be performed while the assembled generator remains on the support surface. For example, a brake disk can be mounted on the top side of the rotor housing and various test steps can be performed. Finally, any threaded rod used to secure the rotor member 2 to the assembly table 1 can be removed and the assembled generator can then be lifted from the assembly table.

  FIG. 7 shows another detail of the assembly table 1 of the previous FIGS. Here, the height of the upper surface of the table 1 can be adjusted as necessary. This is made possible by the height adjusting means 14 arranged between the support column 11 and the table top 10. For example, the hydraulic height adjusting means 14 can have a hydraulic cylinder as an actuator for allowing vertical movement, as indicated by the arrows, thereby increasing the overall height of the column 11. It can be slightly stretched or shrunk as required. A hydraulic pump 140 can be used to control one or more of the height adjustment means 14. The height adjustment means 14 can be controlled manually using a visual height indicator, such as a level for determining any deviation from the horizontal state. Alternatively, the height adjusting means 14 can be controlled automatically. For example, the height detection means 141 disposed on or below the support portion 10 can be used to detect any deviation from the horizontal state, and the control device for the height adjustment means 14. An appropriate signal can be transmitted to

  Fig. 8 shows a plan view of an alternative embodiment of an assembly arrangement 1 'according to the invention. Here, the assembly arrangement 1 'has a three-part configuration and is provided with three adapted support segments 10'. Segment 10 'is formed such that opening 12 remains when segments 10' are placed in contact with each other. The segment 10 ′ can be placed on a plurality of support columns 11 or pillars 11. Any spacer block can be arranged above these columns 11 so that a favorable load transmission can be achieved when the rotor is mounted on the spacer block. The circular shape of the assembly arrangement 1 'and the opening 12 shown here is exemplary only, and other shapes are possible. Also, any shape and any number of support segments 10 'can be used to obtain the desired assembly support.

  Although the invention has been disclosed as preferred embodiments and variations thereof, it will be understood that many additional modifications and changes may be made thereto without departing from the scope of the invention. Let's go. For example, the assembly structure and / or assembly method can be adapted to be suitable for assembly of a generator with an internal rotor and / or suitable for a generator in which the magnetic field is stationary while the armature rotates. . Basically, the vertical assembly method is suitable for any assembly where the gravitational distortion effect needs to be avoided.

  For clarity, it should be understood that the use of “a” or “an” throughout this application does not exclude a plurality, and “including” does not exclude other steps or elements.

DESCRIPTION OF SYMBOLS 1 Assembly table, 2 Rotor member, 3 Stator member, 4 Bearing, 5 Front plate, 10 Upper surface, 10 'Segment, 11 Leg part, Support pillar or column, 12 Opening, 13, 13' Spacer block, 14 Height adjustment means , 141 Height detection means, 15 Threaded rod, 16 Guide block, 20 Rotor housing, 21 Groove, 30 Main shaft, 31 Inner shaft, 32 Winding, 100 Direct drive permanent magnet generator, 101 Outer rotor, 102 Permanent magnet , 103 stator, 104 windings, 105 spindle, R rotational axis, g _A gap, F _G gravity, 130 through hole

Claims (15)

A method of assembling a wind turbine generator in a vertical direction,
Horizontal assembly for supporting the generator components (2, 3, 4, 5) such that the rotational axes (R) of the components (2, 4, 5) are substantially vertical during assembly. A support (10, 10 ') which allows access to the interior of the component (2, 3) of the generator during the assembly procedure. Providing a horizontal assembly support (10, 10 ') configured as follows:
Placing the rotor member (2) on the horizontal assembly support (10, 10 ');
Disposing a stator member (3) on the rotor member (2);
Joining the stator member (3) to the rotor member (2). A method for assembling a wind turbine generator in a vertical direction.   The method according to claim 1, comprising attaching the rotor member (2) to a bearing (4).   The method according to claim 1 or 2, comprising the step of attaching an anti-elliptical ring to the bearing (4).   4. The method according to claim 1, comprising attaching a stabilization ring (6) to the rotor member (2) before mounting a plurality of magnets (22) on the rotor member (2). 5. Method.   The method according to claim 4, wherein, after the step of placing the stator member (3) on the rotor member (2), the magnet (22) is attached to the rotor member (2).   The step of disposing the stator member (3) on the rotor member (2) includes lowering the stator member (3) into the rotor member (2). The method described in the paragraph.   The step of securing the rotor member (2) to the horizontal assembly support (10, 10 ') prior to the step of placing the stator member (3) on the rotor member (2). 7. The method according to any one of items 6 to 6.   An assembly arrangement (1, 1 ') for use in the vertical assembly of a wind turbine generator, the assembly arrangement (1, 1') being a component (2, 4, 5) during assembly A horizontal assembly support (10) for supporting the generator components (2, 3, 4, 5) such that the rotation axis (R) of the generator is substantially vertical, the assembly support (10) is configured to allow access to the interior of the component (2, 3) of the generator during the assembly procedure, the wind turbine generator vertical direction Assembly arrangement (1, 1 ') for use in assembly at   The assembly arrangement (1) includes an assembly table (1) and a plurality of substantially vertical support columns (11), and the horizontal assembly support (10) is provided on the assembly table (1). 9. Assembly arrangement according to claim 8, having a substantially horizontal upper surface (10).   10. Assembly arrangement according to claim 8 or 9, wherein the assembly table (1) has an access opening (12) shaped according to the opening of the rotor member (2).   A plurality of spacer blocks (13, 13 '), preferably at least three spacer blocks (13), attached to the assembly support (10) to provide access to the underside of the rotor member (2). , 13 '). Assembly assembly according to any one of claims 8 to 10.   12. Assembly according to claim 11, wherein the spacer block (13) has a through hole (130) for receiving a clamping means (15) for clamping the rotor member (2) to the assembly support (10). An array.   13. The diameter of the access opening (12) is at least 0.5 m and / or the height of the spacer block (13, 13 ′) is at least 10 cm, preferably at least 50 cm. The assembly arrangement according to any one of the preceding claims.   14. Assembly arrangement according to any one of claims 8 to 13, comprising height adjusting means (14) for adjusting the height of the assembly support (10).   Use of the assembly arrangement (1, 1 ') according to any one of claims 9 to 14 in the assembly of a wind turbine generator.

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